Method delete_edges_for_node

nodedb/src/engine/graph/edge_store/cascade.rs:16–29

Soft-delete every edge incident on `node` (as either src or dst) in the caller's tenant, across all collections. Emits a tombstone version at `system_from` for each distinct base edge that has a live (non-sentinel) latest version.

(
        &self,
        tid: TenantId,
        node: &str,
        system_from: i64,
    )

    /// version at `system_from` for each distinct base edge that has a
    /// live (non-sentinel) latest version.
    pub fn delete_edges_for_node(
        &self,
        tid: TenantId,
        node: &str,
        system_from: i64,
    ) -> crate::Result<()> {
        // Snapshot all live bases touching `node`. Done in a read txn first
        // so the write txn can call soft_delete_edge without nested locks.
        let bases = self.live_bases_touching_node(tid, node)?;
        for (collection, src, label, dst) in &bases {
            self.soft_delete_edge(EdgeRef::new(tid, collection, src, label, dst), system_from)?;
        }
        Ok(())
    }

    /// Enumerate `(collection, src, label, dst)` tuples for every base edge
    /// in this tenant whose latest version touches `node` as src or dst and